def builtin_bus_factory():
cs = DigitalInOut(board.D5)
cs.switch_to_output()
return CAN(board.SPI(),
cs,
baudrate=1000000,
loopback=True,
silent=True)
def builtin_bus_factory():
return CAN(rx=CAN_RX, tx=CAN_TX, baudrate=1000000, loopback=True)
def bus():
cs = DigitalInOut(CS_PIN)
cs.switch_to_output()
return CAN(SPI(), cs, loopback=True, silent=True)
# SPDX-FileCopyrightText: Copyright (c) 2020 Bryan Siepert for Adafruit Industries
#
# SPDX-License-Identifier: MIT
from time import sleep
import board
import busio
from digitalio import DigitalInOut
from adafruit_mcp2515.canio import Message, RemoteTransmissionRequest
from adafruit_mcp2515 import MCP2515 as CAN
cs = DigitalInOut(board.D5)
cs.switch_to_output()
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
can_bus = CAN(spi, cs, loopback=True,
silent=True) # use loopback to test without another device
while True:
with can_bus.listen(timeout=1.0) as listener:
message = Message(id=0x1234ABCD, data=b"adafruit", extended=True)
send_success = can_bus.send(message)
print("Send success:", send_success)
message_count = listener.in_waiting()
print(message_count, "messages available")
for _i in range(message_count):
msg = listener.receive()
print("Message from ", hex(msg.id))
if isinstance(msg, Message):
print("message data:", msg.data)
if isinstance(msg, RemoteTransmissionRequest):
print("RTR length:", msg.length)
# SPDX-FileCopyrightText: Copyright (c) 2020 Bryan Siepert for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import board
import busio
from digitalio import DigitalInOut
from adafruit_mcp2515.canio import Message, RemoteTransmissionRequest
from adafruit_mcp2515 import MCP2515 as CAN
NODE_ID = 0x1234ABCD
cs = DigitalInOut(board.D5)
cs.switch_to_output()
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
can_bus = CAN(spi, cs)
while True:
with can_bus.listen(timeout=1.0) as listener:
message = Message(id=NODE_ID, data=b"adafruit", extended=True)
send_success = can_bus.send(message)
print("Send success:", send_success)
message_count = listener.in_waiting()
if message_count == 0:
continue
print(message_count, "messages available")
for _i in range(message_count):
msg = listener.receive()
print("Message from ", hex(msg.id), "extended:", msg.extended)
if isinstance(msg, Message):
print("message data:", msg.data)
# SPDX-FileCopyrightText: Copyright (c) 2020 Bryan Siepert for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import digitalio
import board
import busio
from adafruit_mcp2515.canio import Timer
from adafruit_mcp2515.canio import RemoteTransmissionRequest, Message
from adafruit_mcp2515 import MCP2515 as CAN
cs = digitalio.DigitalInOut(board.D5)
cs.switch_to_output()
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
mcp = CAN(spi, cs, silent=True)
t = Timer(timeout=5)
next_message = None
message_num = 0
while True:
# print occationally to show we're alive
if t.expired:
print(".", end="")
t.rewind_to(1)
with mcp.listen(timeout=1.0) as listener:
message_count = listener.in_waiting()
if message_count == 0:
continue
next_message = listener.receive()